Final answer:
A change in the management team is not an important factor to consider when preparing a sales forecast.
Step-by-step explanation:
When preparing a sales forecast, it is important to consider several factors, but one factor that is not important to consider is C. a change in the management team. The other factors mentioned - the state of the economy, seasonal demand variations, and competitors' actions - are all crucial in determining sales projections. A change in the management team may have an impact on the sales process, but it is not a factor directly related to sales forecasting.